PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-06:57:40
G02     204.2          37.3                4.5 +/-    2.16       6.9 +/-    2.16  0.050 / 0.080
G06     160.0          70.8                5.8 +/-    1.26       6.1 +/-    1.26  0.050 / 0.080
G12     308.6          16.8                1.7 +/-    1.88       4.2 +/-    1.88  0.070 / 0.150
G17     40.8           44.8                2.2 +/-    0.30       3.0 +/-    0.30  0.070 / 0.150
G19     2.1            64.6                3.4 +/-    0.39       3.7 +/-    0.39  0.040 / 0.030
G24     290.3          42.2                2.5 +/-    1.13       3.5 +/-    1.13  0.030 / 0.030
G28     104.0          31.3                7.2 +/-    0.96      12.3 +/-    0.96  0.090 / 0.210